diff --git a/interfaces/astm-utm/Protocol b/interfaces/astm-utm/Protocol
index 962024be8..fd6a3fe96 160000
--- a/interfaces/astm-utm/Protocol
+++ b/interfaces/astm-utm/Protocol
@@ -1 +1 @@
-Subproject commit 962024be8835bddaed87a17390062836d994754c
+Subproject commit fd6a3fe96e0d7d086e34bdbf5bd7c37d6c5f3f5b
diff --git a/interfaces/openapi-to-go-server/example/api/scd/types.gen.go b/interfaces/openapi-to-go-server/example/api/scd/types.gen.go
index 2c1813f3f..477e27c3d 100644
--- a/interfaces/openapi-to-go-server/example/api/scd/types.gen.go
+++ b/interfaces/openapi-to-go-server/example/api/scd/types.gen.go
@@ -117,6 +117,9 @@ type SubscriberToNotify struct {
 	// Subscription(s) prompting this notification.
 	Subscriptions []SubscriptionState `json:"subscriptions"`
 
+	// Created by the DSS based on creating client's ID (via access token)
+	Manager string `json:"manager"`
+
 	UssBaseUrl SubscriptionUssBaseURL `json:"uss_base_url"`
 }
 
@@ -124,6 +127,9 @@ type SubscriberToNotify struct {
 type Subscription struct {
 	Id SubscriptionID `json:"id"`
 
+	// Created by the DSS based on creating client's ID (via access token). Used internal to the DSS for restricting read, mutation and deletion operations to manager.
+	Manager string `json:"manager"`
+
 	// Version of the subscription that the DSS changes every time a USS changes the subscription.  The DSS incrementing the notification_index does not constitute a change that triggers a new version.  A USS must specify this version when modifying an existing subscription to ensure consistency in read-modify-write operations and distributed systems.
 	Version string `json:"version"`
 
diff --git a/pkg/api/scdv1/types.gen.go b/pkg/api/scdv1/types.gen.go
index b14deb25b..0572423fe 100644
--- a/pkg/api/scdv1/types.gen.go
+++ b/pkg/api/scdv1/types.gen.go
@@ -117,6 +117,9 @@ type SubscriberToNotify struct {
 	// Subscription(s) prompting this notification.
 	Subscriptions []SubscriptionState `json:"subscriptions"`
 
+	// Created by the DSS based on creating client's ID (via access token)
+	Manager string `json:"manager"`
+
 	UssBaseUrl SubscriptionUssBaseURL `json:"uss_base_url"`
 }
 
@@ -124,6 +127,9 @@ type SubscriberToNotify struct {
 type Subscription struct {
 	Id SubscriptionID `json:"id"`
 
+	// Created by the DSS based on creating client's ID (via access token). Used internal to the DSS for restricting read, mutation and deletion operations to manager.
+	Manager string `json:"manager"`
+
 	// Version of the subscription that the DSS changes every time a USS changes the subscription.  The DSS incrementing the notification_index does not constitute a change that triggers a new version.  A USS must specify this version when modifying an existing subscription to ensure consistency in read-modify-write operations and distributed systems.
 	Version string `json:"version"`
 
diff --git a/pkg/scd/models/subscriptions.go b/pkg/scd/models/subscriptions.go
index aa66ecb5f..647072adb 100644
--- a/pkg/scd/models/subscriptions.go
+++ b/pkg/scd/models/subscriptions.go
@@ -42,6 +42,7 @@ type Subscription struct {
 func (s *Subscription) ToRest(dependentOperationalIntents []dssmodels.ID) (*restapi.Subscription, error) {
 	result := &restapi.Subscription{
 		Id:                          restapi.SubscriptionID(s.ID.String()),
+		Manager:                     s.Manager.String(),
 		Version:                     s.Version.String(),
 		NotificationIndex:           restapi.SubscriptionNotificationIndex(s.NotificationIndex),
 		UssBaseUrl:                  restapi.SubscriptionUssBaseURL(s.USSBaseURL),
diff --git a/pkg/scd/server.go b/pkg/scd/server.go
index a8eab0aaa..7282e78fd 100644
--- a/pkg/scd/server.go
+++ b/pkg/scd/server.go
@@ -9,17 +9,26 @@ import (
 func makeSubscribersToNotify(subscriptions []*scdmodels.Subscription) []restapi.SubscriberToNotify {
 	result := []restapi.SubscriberToNotify{}
 
-	subscriptionsByURL := map[string][]restapi.SubscriptionState{}
+	type uss struct {
+		manager string
+		baseUrl restapi.SubscriptionUssBaseURL
+	}
+	subscriptionsByUSS := map[uss][]restapi.SubscriptionState{}
 	for _, sub := range subscriptions {
 		subState := restapi.SubscriptionState{
 			SubscriptionId:    restapi.SubscriptionID(sub.ID.String()),
 			NotificationIndex: restapi.SubscriptionNotificationIndex(sub.NotificationIndex),
 		}
-		subscriptionsByURL[sub.USSBaseURL] = append(subscriptionsByURL[sub.USSBaseURL], subState)
+		uss := uss{
+			manager: sub.Manager.String(),
+			baseUrl: restapi.SubscriptionUssBaseURL(sub.USSBaseURL),
+		}
+		subscriptionsByUSS[uss] = append(subscriptionsByUSS[uss], subState)
 	}
-	for url, states := range subscriptionsByURL {
+	for uss, states := range subscriptionsByUSS {
 		result = append(result, restapi.SubscriberToNotify{
-			UssBaseUrl:    restapi.SubscriptionUssBaseURL(url),
+			Manager:       uss.manager,
+			UssBaseUrl:    uss.baseUrl,
 			Subscriptions: states,
 		})
 	}